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All Words Glossary

Glossary of Physics Terms
beginning with letter L
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Lagrangian function Tweet Definition of Lagrangian function Like Definition of Lagrangian function on Facebook
noun (wikipedia, Lagrangian)
  1. (mathematics) a function of the generalized coordinates and velocities of a dynamic system from which Lagrange's equations may be derived
Larmor precession Tweet Definition of Larmor precession Like Definition of Larmor precession on Facebook
noun
  1. (physics) the precesion of the motion of charged particles, or particles having a magnetic moment, in a magnetic field
laser Tweet Definition of laser Like Definition of laser on Facebook
noun (lasers)
  1. A device that produces a monochromatic, coherent beam of light.
laser beam Tweet Definition of laser beam Like Definition of laser beam on Facebook
noun (laser beam, laser beams)
  1. The light emitted by a laser.
latent heat Tweet Definition of latent heat Like Definition of latent heat on Facebook
noun
  1. (physics) the heat that is released or absorbed accompanying a change of state or of phase
lattice Tweet Definition of lattice Like Definition of lattice on Facebook
noun
  1. A flat panel constructed with widely-spaced crossed thin strips of wood or other material. It is commonly used as a garden trellis.
  2. (crystallography) a regular spacing or arrangement of geometric points, often decorated with a motif.
    1. (algebra) A partially ordered set in which every pair of elements has a unique supremum and an infimum.
Laurence Tweet Definition of Laurence Like Definition of Laurence on Facebook
proper noun
  1. (given name, male)
Lawson criterion Tweet Definition of Lawson criterion Like Definition of Lawson criterion on Facebook
noun
  1. (physics) a necessary, but not sufficient coindition for the achievement of sustained release of energy from a nuclear fusion reactor; that the heating effect of the reaction should exceed the losses
lens Tweet Definition of lens Like Definition of lens on Facebook
noun (plurallenses)
  1. An object, usually made of glass, that focuses or defocuses the light that passes through it.
  2. A device which focuses or defocuses electron beams.
  3. (geometry) A shape comprising two circular arcs, joined at their endpoints.
  4. (biology) A genus of the legume family.
  5. (anatomy) The transparent crystalline structure in the eye.
lepton Tweet Definition of lepton Like Definition of lepton on Facebook
noun (lepta)
  1. A small, bronze Judean coin from the 1st century BCE. The lowest value coin ever in circulation. Considered by some to be the widow's mite.
lifetime Tweet Definition of lifetime Like Definition of lifetime on Facebook
noun
  1. The duration of the life of someone or something.
  2. (context, informal, hyperbolic) A long period of time.
I've been waiting a lifetime for a train.
linac Tweet Definition of linac Like Definition of linac on Facebook
noun
  1. (physics) A linear particle accelerator.
    • 2004: Usually such "linacs" are short, low-energy machines, but they can be high energy and lengthy, as at the Stanford Linear Accelerator in California. " Frank Close, Particle Physics: A Very Short Introduction (Oxford 2004, p. 49)
line of force Tweet Definition of line of force Like Definition of line of force on Facebook
noun
  1. (physics) an imaginary line in a field of force, whose tangent at any point gives the direction of the field at that point and whose number through unit area perpendicular to the field represents its intensity
liquefaction Tweet Definition of liquefaction Like Definition of liquefaction on Facebook
noun
  1. Process of, or state of having been, made liquid.
liquefy Tweet Definition of liquefy Like Definition of liquefy on Facebook
verb (liquefies, liquefying, liquefied)
  1. To make into a liquid, either by condense, condensing a gas or by melting a solid.
liquid Tweet Definition of liquid Like Definition of liquid on Facebook
noun
  1. A fundamental state of matter. Liquid is a state between solid and gaseous. A liquid can usually be contained within a glass or a similar container without allowing escape. A liquid can freeze to become a solid or evaporate into a gas.
  2. (phonetics) An l or r sound.
adjective
  1. Existing in the physical state of a liquid. (Liquid nitrogen)
  2. (finance) Of an asset, easily sold or disposed of.
  3. (finance) Of a market, having sufficient trading activity to make buying or selling easy.
2005: The spot foreign exchange market is the world"s largest and most liquid financial market. With a daily trading volume of over $1.5 trillion, the spot forex market can absorb trading sizes that dwarf the capacity of any other market. — xpresstrade.com http://www.xpresstrade.com/24hour_liquidity.html
Lissajous figure Tweet Definition of Lissajous figure Like Definition of Lissajous figure on Facebook
noun (wikipedia, Lissajous curve)
  1. (mathematics) a plane curve traced by a point which executes two perpendicular independent harmonic motions, the frequencies of which are in a simple ratio
loop Tweet Definition of loop Like Definition of loop on Facebook
noun
  1. A length of thread, line or rope that is doubled over to make an opening; the opening so formed
  2. A shape produced by a curve that bends around and crosses itself.
  3. An endless strip of tape or film allowing continuous repetition.
  4. A complete circuit for an electric current.
  5. (computing) A programmed sequence of instructions that is repeated until or while a particular condition is satisfied.
  6. (graph theory) A pair of repeated nodes of an oriented graph represented as an arrow with coinciding endpoints.
  7. A loop-shaped intrauterine device
  8. a maneuver in which an aircraft flies a circular path in a vertical plane
Lorentz transformation Tweet Definition of Lorentz transformation Like Definition of Lorentz transformation on Facebook
noun
  1. (cattag2, Mathematics, Physics) A transformation relating the space-time coordinates of one frame of reference to another in special relativity.

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